Tennessee Code Title 64. Regional Authorities § 64-9-108

(a) The state fire marshal has exclusive jurisdiction over all plans review, permitting, and inspections for, and enforcement of, standards designed to afford a reasonable degree of safety to life and property from fire and hazards for all constructed, altered, or repaired buildings or structures at the megasite, including all electrical installations, plumbing systems, fire protection systems, and mechanical systems for all such buildings and structures. The fire safety, electrical, and building construction safety standards established pursuant to §§ 68-102-113, 68-102-143, and 68-120-101 apply to all buildings or structures at the megasite. The state fire marshal is the sole authority with jurisdiction regarding, and may approve, equivalencies or variances from applicable code requirements for constructed, altered, or repaired buildings or structures located at the megasite including electrical installations, plumbing systems, fire protection systems and mechanical systems for such buildings or structures at the megasite.

(b) This section must not be construed to limit the authority of the board of boiler rules, the elevator and amusement device safety board, or the commissioner of labor and workforce development.